There is no substantial change in anodizing treatment in recent years

In recent years, the understanding that the conductive oxidation film is easy to absorb organic coatings and has good adhesion has been further improved. In the process of aluminum corrosion resistance treatment and aluminum mold casting molding parts in the pretreatment process need to pay attention to. Not all surfaces of casting parts are machined, and the workpieces need to be cleaned with organic solvent before they are transferred to heat treatment or welding process. However, at present, it is generally impossible to do this. A layer of oil burning coking material is formed on the surface, which is difficult to remove in organic solvent. If it is immersed in hard oxidation and coloring, it will cause local corrosion, pitting or unevenness, which will seriously affect the product quality.

Aluminum oxidation process is also called aluminum anodizing processing. Aluminum or its alloy is placed in the corresponding electrolyte as anode under specific conditions and external current. A thin layer of alumina with a thickness of 5-20 μ m and a hard anodizing film of 60-200 μ m is formed on the surface of the anode aluminum or its alloy. In order to meet the requirements of the new era, the development of plastic bottle packaging materials must be based on saving resources, saving energy, easy recycling after use, easy disposal or degradation by the environment. New materials, new processes, new technologies and new products of plastic bottle packaging are constantly emerging It is developing in high performance, multi-function, actively adopting new energy and new technology, broadening application fields, and coordinated development of plastic bottle packaging and environmental protection.

In the past 10 years, China's aluminum oxidation processing has developed by leaps and bounds, and the production scale of aluminum profiles has been close to 1 million tons per year. Driven by foreign advanced technology and imported equipment, China's aluminum profile production technology has made new progress in anodic oxidation process and equipment, and has established the latest production lines of electrostatic powder spraying, electrostatic liquid-phase spraying, electrophoretic coating, etc. the foreign cutting-edge technology has sprouted in China and has developed in different degrees. The anodizing process has not changed fundamentally in the past 20 years. The technology of hard anodizing has made great progress in this period. "Spark" anodizing and micro arc oxidation, which break through the Faraday area of anodic oxidation, have been commercialized. However, the recently developed high-speed and high-efficiency anodizing technology has not been widely used in industry.

  In order to meet the requirements of the new era, the development of plastic bottle packaging materials must be based on saving resources, saving energy, easy recycling after use, easy disposal or degradation by the environment. New materials, new processes, new technologies and new products of plastic bottle packaging are constantly emerging It is developing in high performance, multi-function, actively adopting new energy and new technology, broadening application fields, and coordinated development of plastic bottle packaging and environmental protection. In addition, it is very important to color the temperature must be appropriate, otherwise it will make the color film fogging. Technical reasons: throughout the current situation of aluminum industry, the technical personnel of anodizing and coloring are from metallurgy, heat treatment, and Machining It is inevitable that those who change professions will have difficulties in leading the reform of technology.



   Links to more articles:《 Requirements for aluminum oxidation 》《 What is the color of aluminum oxide? 》



   Related label: anodic oxidation ， Aluminum oxidation processing ， Hard anodizing